Secure frontier‑model access programs and trusted‑AI gateways are the architectures, policies, and products organizations use to give classified or regulated workloads controlled, auditable access to top-tier models and autonomous agents. This topic covers the intersection of AI security governance, regulatory compliance, and operational AI governance: how enterprises enforce least‑privilege access, provenance, and telemetry for conversation and agent runtimes while meeting audit and policy requirements. The need is timely: by 2026 enterprises face wider operational use of agentic systems and stricter expectations for model provenance, logging, and isolation. That increases the attack surface and regulatory scrutiny, so defense‑in‑depth (zero‑trust access, enclave/air‑gapped hosting, cryptographic attestation, immutable audit trails) and visibility into agent activity have become baseline controls. Key categories and representative tools described here include no‑code/low‑code agent platforms (StackAI, Lindy) that accelerate internal automation while embedding governance hooks; enterprise agent infrastructure (Xilos) that emphasizes 100% visibility and control over connected services and agent activity; and model/assistant providers (Anthropic’s Claude family, IBM watsonx Assistant) that are commonly integrated behind gateways or private deployments to provide conversational and developer assistance in compliant environments. In practice, secure programs combine platform controls (role‑based access, data filters, policy engines), infrastructure telemetry (agent orchestration logs, service call tracing), and model access controls (VPC endpoints, private model instances, usage adjudication) to meet both security and compliance needs. Evaluating solutions requires testing for isolation capabilities, comprehensive audit and forensics, demonstrable policy enforcement, and operational controls for lifecycle management of agents and model access—criteria that determine whether a gateway or access program is suitable for classified or highly regulated enterprise use.